Perturbed Poeschl-Teller oscillators
arXiv:math-ph/0001022 · doi:10.1016/S0375-9601(00)00077-3
Abstract
Wave functions and energies are constructed in a short-range Poeschl-Teller well (= negative quadratic secans hyperbolicus) with a quartic perturbation. Within the framework of an innovated, Lanczos-inspired perturbation theory we show that our choice of non-orthogonal basis makes all the corrections given by closed formulae. The first few items are then generated using MAPLE.
10 pages, Latex, submitted to Physics Letters A